Can a four-month-old baby take vitamin D?

Patient's question:

No

Doctor's answer:

Okay, here is the translation with the specified requirements:
Okay, you can take Vitamin AD fish liver oil as "Beiteng" or "Ikexin". I recommend "Ikexin", it has a peanut oil scent, the baby likes it more, while "Beiteng" is quite fishy. Fish liver oil should not exceed one pill per day, taking too much can cause poisoning.